All the Upanishads are the cows, the one who milks the cows is Krishna, Arjuna (Partha) is the calf. Men of purified intellect are the enjoyers; the milk is the great nectar of the Gita.The only scripture is the song of the son of Devaki. The only deity is the son of Devaki. The only mantra is His Names. The only action is the service of That Deity.